Subtract 75/81 from 7/12, Solve 7/12

Subtract 75/81 from 7/12

7/12 - 75/81 is -37/108.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324

Next, find the equivalent fraction of both fractional numbers with denominator 324
For the 1st fraction, since 12 × 27 = 324,
7/12 = 7 × 27/12 × 27 = 189/324
Likewise, for the 2nd fraction, since 81 × 4 = 324,
75/81 = 75 × 4/81 × 4 = 300/324
Subtract the two like fractions:
189/324 - 300/324 = 189 - 300/324 = -111/324
After reducing the fraction, the answer is -37/108

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